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A tank initially at a pressure of 6.70 atm contains 20.0 moles of oxygen gas at 25.0 degrees celsius. Its temperature is then increased to 45.0 degrees celsius, and an addditional 10.0 moles of gas are added. What is the final pressure?
Calculate the molar concentration of Tl+ and Cl- in this saturated solution. Calculate Ksp value for TlCl at this temperature
The mass of an Argon atom is more than that of a Helium atom. Does that mean that because of Argon has larger mass, it exerts a higher pressure on the walls of container than Helium at the same volume, molar density and temperature? Give explanati..
Copper has two isotopes: Cu-63 (abundance = 69.2%, mass = 62.930 amu) and Cu-65 (abundance = 30.8%, mass = 64.928 amu). Calculate the (average) atomic mass of copper.
Calculate the molar solubility of CaCO3 ( Ksp = 4.5*10-9) neglecting the acid-base character
how many liters of H2 would be formed at 628 mm Hg and 14 degrees celcius if 22.5g of zinc was allowed to react
what will be the equilibrium concentration of CO.
The pH of 0.750 M sodium hypochlorite, NaClO, is 10.72. What is the pKb for this base?
The water temperature before the reaction was 34.5°C, and after the reaction it had risen to 52.0°C. How many moles of water were formed?
Compute delta Hf for CaC2 : CaC2 + 2H2O-->Ca(OH)2 +C2H2 From the given enthalpy of reaction data as water(H2O) =(2*-285.83),calcium hydroxide Ca(OH)2=(-986.2) , AcetyleneC2H2 =(226.77)?
Predict whether the entropy change in the system is positive, negative or close to zero for each of the following processes
explain why it is appropriate to group a polyatomic ion in parentheses in a chemical formula, if more than one of that ion is present in the formula.
What is the pH of the solution resulting from the addition of 25.0 mL of .01M NaOH solution to 40.0 mL of .01M acetic acid
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